Cooling system for tractors.



APPLICATION FILED APR-4,1914.

Patented May 4, 1915 ARCHIE WILLIAMS, 0F CLIMAX, MINNESOTA.

COOLING SYSTEM FOR TRACTORS.

Specification of Letters Patent.

Patented May 4, 1915.

Application filed April 4, 1914. Serial No. 829,569.

View being to provide a system of this character which reduces to a minimum the evaporation of the cooling fluid and at the same time secures the most effective cooling of this fluid by subjecting the same to a maximum surface acted upon by circulating air.

A feature of my invention is the employment of the exhaust of the engine with which the system will be employed for inducing the circulation of the air about the passages for the engine cooling medium,

thus causing a forced draft to perform the cooling function only under operating conditions.

A still further object of this device lies in the provision of an arrangement whereby the circulating 'fluid is drawn from the entire system into the supply reservoir during' inoperation of the apparatus thus reducing likelihood of damage to the conduits for the fluid by freezing.

More specifically speaking, in carrying out the invention, I provide a radiator which comprises a water reservoir with conduits leading to the engine to be cooled from which said water passes to what I term a return conduit containing a plurality of air passages around which the water flows, and a main air compartment or chamber in which is disposed a plurality of very wide attenuated conduits arranged in a zigzag manner and connected with. the return conduit, maintaining a forced circulation of air in the air chamber aforesaid through the instrumentality of the engine exhaust which is also led therethrough.

These and such other objects as may hereinafter appear are attained by the novel construction, combination and arrangement of arts to be hereinafter specifically descri ed and claimed.

Reference will now be had to the accompanying drawing forming a part of this specification, wherein Figure 1 is a rear elevation of my invention. Fig. 2 is a longitudinal sectional view on the line 2-2 of Fig. 1. Fig. 3 is a transverse sectional view on the line 33 of Fig. 2; and Fig. 4 is a plan view, the body member being shown in section and the exhaust pipe and stack shown in dotted lines, in order to bring out more clearly the details of construction. Fig. 5 is a fragmentary view of a slightly modified form of cooling conduits embodying fins to accelerate the cooling process in the air chamber.

Throughout the following detail description, and on the several figures of the drawings, similar parts are referred to by like reference characters.

Referring to the drawing and specifically describlng my system, the numeral 1 designates a body member or container having a partition 2 extending across the same so as to divide the member into the lower compartment 3 constituting the reservoir for the cooling fluid and the upper compartment 4 which constitutes an air chamber. The top of the body 1 is provided with a removable cover 5 seated snugly thereon and having an exhaust stack 6 disposed centrally thereof. The cover 5 is locked in position upon the body by the tie rods 7 which also connect with the frame of the machine on which the body is disposed not shown in thepresent drawing, one of such rods being located at each corner of the body. The reservoir 3, as hereinbefore mentioned, is filled with the cooling fluid, water,

through the laterally projecting spouts 8,

.one at each side of the reservoir, eachof such spouts being provided with a cover 9. In the actual use of this system it will be understood that the circulation of the ,Water throu h the engine and the radiator is maintaine by the usual force pump or by means of the motor during the operation of the same, the water passing through the pipe 10 to the engine, not shown, and from the engine throu h the pipe 11 to the return conduit 12. his conduit 12 is of peculiar construction in that it is quite large in size and provided with a plurality of longitudinally extending tubes 13 constituting air passages, said tubes being positioned in the closed heads for the conduit. The water in passing through the conduit 12 just mentioned flows about the air tubes 13 and this action of the air on the water causes preliminary cooling of the same and said water flows from the conduit 12 through a short connecting pipe 1 1 to the interior of the air chamber 4: where it passes into the distributing pipe 15. At each end of this chamber the distributing pipe 15 is formed with the lateral branches 15 15, each of which has a plurality of openings in its bottom designated 15 so that the water passes therefrom into a set of broad attenuated passages 16 connected to each of the lateral branches and communicating at their lower extremities with the reservoir 3 through the partition 2.

The ends of the tubes 13, designated by the reference character 17 are open to the atmosphere while the other ends of the tubes lead to a downwardly extending passage 18 constructed so as to communicate with the air chamber 4 at one side, this passage 18 terminating in a cover plate 19, shown most clearly in Fig. 3 of the drawings, secured to the side of the body 1 in any desired manner. As shown in Fig. 2 of the drawing most clearly, the exhaust pipe 20 from the engine is disposed at the rear portion of the radiator and passes into the same, or more strictly speaking into the air chamber 4 adjacent the top portion and then upwardly at its extremity into the exhaust stack 6. Under the pulsating exhaust from the ehgine it will be obvious that a circulation of air is caused to pass through the air tubes or passages 13 in the conduit 12 downwardly through the passage 18 and into the air chamber 4. This circulation passes over the wide water conduits 16 and upwardly betweenthe same and finally out the exhaust stack.

While I have described my apparatus as comprising a single conduit 12 and passage 18, I prefer to use in my construction a pair of said conduits each having, of course, communicating passages for leading the air therefrom to the air chamber 4 at each side of the same as distinctly shown in the drawing. Likewise a double set of water conduits is provided in the air chamber, all for the purpose of obtaining the maximum amount of cooling action for the vcooling medium and as hereinbefore inferred, the preliminary cooling of the water returning from the engine is performed by the flowing of said water around air tubes while the final or second stage of cooling takes place in the air chamber where the fluid is spread out into wide streams in the conduits 16 to be acted on by the air to accomplish this cooling action most effectively.

I provide beneath the reservoir 3 a lobe valve 21 by meansnof which the water' rom the reservoir may be drained through the the conduits 12 into the reservoir 3 by way of the conduits 16 and the cooling medium is, therefore, always maintained when inoperative in the supply reservoir.

By my arrangement the evaporation of the water is reduced to a minimum because of the fact that the 'Water is not subjected to the open atmosphere during any of its travel about the system and this is particularly advantageous in machinery of the character with which my system is employed.

It-is clearly within the purview of this invention to form the broad zigzag conduits in the cooling chamber 4 after a manner shown most clearly in the modified construction of Fig. 5 wherein the tubes 16 are formed with projecting fins 16 which act to facilitate the cooling process in an obvious manner.

Having thus described my invention, what I claim as new is:

1. An engine cooling system of the class described, comprising a water reservoir, a distributing conduit, a primary cooling chamber constituting a return conduit, a plurality of "air tubes open at one end to the atmosphere and arranged in said return conduit to subject the water to preliminary cooling, a secondary cooling compartment comprising an air chamber associated with the air conduit and with which thetubes communicate. at their other ends, zig-zag Water passages in the air chamber for conveying the water from the return conduit to the reservoir, and exhaust means in the air. chamber to induce circulation of air through the air tubes in the primary cooling chamber and about the zig-zag passage in the secondary coolin chamber.

2. A cooling system 0 the class described comprising a water reservoir, an air chamber arranged above said reservoir, conduits for leading the water to the air chamber, tubes therein for subjecting the water in the conduits to a cooling medium, and passages leading from the conduits to the air chamber and connecting the tubes therewith, said passages terminating in cover plates for the air chamber.

3. A cooling system of the class described comprising a water reservoir, an air chamber arranged above said reservoir, a pair of conduits for returning water to the reservoir, a plurality of air tubes disposed in said conduits and around which the water flows, passages leadin from the conduits to the air reservoir'an connecting the tubes therewith, said passages terminating in removable cover plates for the sides of the air chamber, a plurality of wide attenuated passages in the air chamber arranged in zigzag form, means for distributing the water from the conduits to the zigzag passages,

and an exhaust pipe passing into the chamber whereby to induce circulation of air through the tubes and about the zigzag passages aforesaid.

In testimony whereof I afiix my signature in presence of two witnesses.

. ARCHIE WILLIAMS. Witnesses J. ROY KIvrrs, ERNEST G. PATERSON. 

